I did some further tests and this may shed some light on why it's not working for certain people - instead of running the FHHisuite as admin try to instead run the command line as admin, e.g.:
1) click Start button and type
cmd
2) right click on it and chose run as admin
3) go to the directory where you have FHHisuite located, for example
cd c:\users\T\FHHisute
4) type FHHiSuiteInstaller.exe and press Enter
On the screenshots you can see the difference between what happens on PC where it didn't work versus the one that worked fine:
1) Computer where it doesn't work:
2) Computer where it works:
In case the linked images don't load here are links:
https://i.ibb.co/Pxcb3Qw/err.jpg
i.ibb.co/VjPK960/err2.jpg
Now that's where my knowledge ends, someone more skillful will have to take it from there!